This is my first time to posting on Langcorrect,. I wishing I can to improve my English creativeomposition skill ins here.

I had passed CET-6, but my spoken English and writening skills are still poor, so I want to make some changes!

I am a mMaster's student now, and I will graduate in June in this year!

It's was such a difficult time of thisthese past three years tofor me, but fourtunately, I have got a good result ofor my graduate thesis!

Congradtulations to myself!

WishHope there isare no big problems in the future!

And wishing you guys have a good day!

Hello everyone, I am Jelly from China.

Hello, and it's a pleasure to meet you!

This is my first time to post on Langcorrect, wishingand I hope I can improve my English creativewriting skill ins here.

"creative skills" sounds very general. This phrase would be more fitting in a context describing multiple skills, like drawing, writing, and painting. However, since you distinguished English as the skill you want to improve and Langcorrect is a writing based website, "writing skills" sounds most natural.

I hadve passed the CET-6, but my spoken English and writening skills are still poor, so I want to make some change!

The difference between "had passed" and "have passed" is subtle and complicated.

I am a masters student now, and I will graduate in June inof this year!

Congratulations!

It's These past three years have been such a difficult time of this three years tofor me, but fourtunately, I have gotreceived a good result ofn my graduate thesis!

Congradtulations to myself!

yes, congratulations! A masters thesis is quite the achievement!

WishI hope there isare no big problems in the future!

If you are referring to the Langcorrect community, you could also say, "I hope everything goes well for everyone"

And wish you guys have a good day!

It'd be natural to connect these last two sentences:
I hope there are no big problems in the future and I wish you guys/all a good day!

Hello everyone,. I am Jelly from China.

This is my first time to posting on Langcorrect, wishing I can. I hope that I improve my English creative writing skill ins here.

I had passed CET-6, but my spoken English and written skills are still poor, so. I want to make some changeprogress!

I am a masters student now, and I will graduate in June inof this year!

It's been such a difficult time of this three years to me, but fourtunately , I have gotreceived a good result ofor my graduate thesis!

Congradtulations to myself!

I plan to go to work after graduation.

WishI hope that there isare no big problems in the future!

AndI wish you guys have a good day!

This is my first time to posting on Langcorrect, I'm wishing that I can improve my English creative skill ins here.

I had passed CET-6, but my spoken English and writening skills are still poor, so I want to make some change!

writing vs. written (written is past tense, writing skills is for general writing)

I am a master student now, and I will graduate in June in this year!

You already said 'in' before June, so it's unnecessary here.

It's suchbeen a difficult time of this three years to me, but fourtunately, I have got a good result ofn my graduate thesis!

Congratulations!! :) Some small spelling errors, but overall good.

Congradtulation to myself!

Spelling correction

WishI hope that there is no big problem in the future!

Hope would be a better word than wish.

And I wish you guys have a good day!

Need a subject

This is my first time to posting on Langcorrect, wishingi hope I can improve my English creative skill in here. / I wish to improve

"wishing" usually needs to be clearly connected to a subject.
I'm wishing to improve my English.
Wishing you all the best!

I hadve passed CET-6, but my spoken English and writening skills are still poor, so I want to make sa change!/ Some change!s

A change- one. Article a is for singular most of the time.
Spoken English is correct. Spoken-adjective here, not a verb
Written is an adjective as well. BUT is used when we describe where something is written, like:
“The name was written on the paper.”
“It’s written on the desk.”
When talking about speech "it was SAID (not spoken) during the meeting" can be equivalent

I am currently a master's student now, and I will graduate inthis June in this year!

It's These three years was such a difficult time of this three years tofor me, but fourtunately, I have got a good result of my graduate thesis!

Congradtulations to myself!

I plan to go tostart working after graduation.

Wish there is nowill not be any big problems in the future!

Will be, cuz we are talking about the future
Is mostly for present

And wish you guys have a good day!

This is my first time to post on Langcorrect, wishhoping I can improve my English creative skills in here.

I had passed the CET-6, but my spoken English and writen skills are still poor, so I want to make some change!

I am a master student now, and I will graduate in June in this year!

It's such has been a diffcult time of this three years tofor me, but fourtunately, I have got a good result ofn my graduate thesis!

Congradtulations to myself!

I plan to go to work after graduation.

Wishing there is noare no more big problems in the future!

And wishi hope you guys have a good day!

This is my first time to posting on Langcorrect,. I wishing I can to improve my English creative skill in English here.

I hadve passed CET-6, but my spoken English speaking and writening skills are still poor, so I want to make some change that!

Some of the word you used like “spoken” and “written”, are usually used in sentences written about something that happened in the past. The word “make” doesn’t have to be used if a sentence can be understood without using it.